greybus: get rid of gbuf->hdpriv
Last time I tried to kill off gbuf->context my efforts were shot down. Now that I've got the connection infrastructure in place, maybe I'll have more luck getting rid of gbuf->hdpriv. The only place it's used is to stash the es1_ap_dev structure pointer in the buffer. But that information is now available through the buffer's connection, so we don't need to use the hdpriv field any more. So get rid of it, and use hd_to_es1(gbuf->connection->hd) to get at what we need. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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